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testcases for recent dag combiner changes

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llvm-svn: 60449
This commit is contained in:
Dale Johannesen 2008-12-03 00:52:41 +00:00
parent a249224590
commit da5e01399a
3 changed files with 54 additions and 0 deletions
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19
test/CodeGen/X86/2008-12-02-dagcombine-1.ll Normal file
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; RUN: llvm-as < %s | llc -march=x86 | grep "(%esp)" | count 2
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i386-apple-darwin9.5"
; a - a should be found and removed, leaving refs to only L and P
define i8* @test(i8* %a, i8* %L, i8* %P) nounwind {
entry:
%0 = ptrtoint i8* %a to i32
%1 = sub i32 -2, %0
%2 = ptrtoint i8* %P to i32
%3 = sub i32 0, %2
%4 = ptrtoint i8* %L to i32
%5 = add i32 %4, %3
%6 = add i32 %5, %1 ; <i32> [#uses=1]
%7 = getelementptr i8* %a, i32 %6 ; <i8*> [#uses=1]
br label %return
return: ; preds = %bb3
ret i8* %7
}

17
test/CodeGen/X86/2008-12-02-dagcombine-2.ll Normal file
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; RUN: llvm-as < %s | llc -march=x86 | grep "(%esp)" | count 2
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i386-apple-darwin9.5"
; a - a should be found and removed, leaving refs to only L and P
define i8* @test(i8* %a, i8* %L, i8* %P) nounwind {
entry:
%0 = ptrtoint i8* %a to i32
%1 = ptrtoint i8* %P to i32
%2 = sub i32 %1, %0
%3 = ptrtoint i8* %L to i32
%4 = sub i32 %2, %3 ; <i32> [#uses=1]
%5 = getelementptr i8* %a, i32 %4 ; <i8*> [#uses=1]
br label %return
return: ; preds = %bb3
ret i8* %5
}

18
test/CodeGen/X86/2008-12-02-dagcombine-3.ll Normal file
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; RUN: llvm-as < %s | llc -march=x86 | grep add | count 2
; RUN: llvm-as < %s | llc -march=x86 | grep sub | grep -v subsections | count 1
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i386-apple-darwin9.5"
; this should be rearranged to have two +s and one -
define i32 @test(i8* %a, i8* %L, i8* %P) nounwind {
entry:
%0 = ptrtoint i8* %P to i32
%1 = sub i32 -2, %0
%2 = ptrtoint i8* %L to i32
%3 = ptrtoint i8* %a to i32
%4 = sub i32 %2, %3 ; <i32> [#uses=1]
%5 = add i32 %1, %4 ; <i32> [#uses=1]
br label %return
return: ; preds = %bb3
ret i32 %5
}